Measurement of the top-quark mass in all-hadronic decays in pp̄ collisions at CDF II

Measurement of the top-quark mass in all-hadronic decays in pp̄ collisions at CDF II

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We present a measurement of the top-quark mass Mtop in the all-hadronic decay channel tt̄→W+bW-b̄→q1q̄2bq3q̄4b̄. The analysis is performed using 310pb-1 of s=1.96TeV pp̄ collisions collected with the CDF II detector using a multijet trigger. The mass measurement is based on an event-by-event likelih...

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Bibliographic Details
Main Authors: Aaltonen, T, Abulencia, A, Adelman, J, Affolder, T, Akimoto, T, Albrow, MG, Ambrose, D, Amerio, S, Amidei, D, Anastassov, A, Anikeev, K, Annovi, A, Antos, J, Aoki, M, Apollinari, G, Arguin, J, Arisawa, T, Artikov, A, Ashmanskas, W, Attal, A, Azfar, F, Azzi-Bacchetta, P, Azzurri, P, Bacchetta, N, Badgett, W
Format: Journal article
Language:English
Published: 2007
Description
Summary:We present a measurement of the top-quark mass Mtop in the all-hadronic decay channel tt̄→W+bW-b̄→q1q̄2bq3q̄4b̄. The analysis is performed using 310pb-1 of s=1.96TeV pp̄ collisions collected with the CDF II detector using a multijet trigger. The mass measurement is based on an event-by-event likelihood which depends on both the sample purity and the value of the top-quark mass, using 90 possible jet-to-parton assignments in the six-jet final state. The joint likelihood of 290 selected events yields a value of Mtop=177.1±4.9(stat)±4.7(syst)GeV/c2. © 2007 The American Physical Society.

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